Hydrogen distribution in primary coke oven tar and its fractions / D. E. Aitbekova, D. K. Makenov, E. I. Andreikov [et al.] // Bulletin of the Karaganda university. Chemistry series. - 2021. - № 1. - P82-90 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): PRIMARY COKE OVEN TAR -- IR SPECTROSCOPY -- PMR SPECTROSCOPY -- ELEMENTAL ANALYSIS -- HYDROGEN DISTRIBUTION Аннотация: The aim of this work is to determine the hydrogen distribution in primary coke oven tar and its fractions. The hydrogen distribution in the primary coke oven tar of «ShubarkolKomir» JSC, its distillate fractions and distillation residue have been determined by the methods of elemental analysis, IR and PMR spectroscopy. The atomic ratio of C: H in the primary coke oven tar is 0.79. All fractions of the tar contain a large amount of alkyl-substituted aromatic compounds, phenols and other substances with alkyl groups. The initial tar characterized by a high content of hydrogen in the α- and β-positions to the aromatic ring, 29 % and 34 % respectively, which indicates a large number of alkyl substituents in the aromatic rings and near double bonds. The total amount of aliphatic and aromatic hydrogen in the tar is 79 % and 21 % respectively. Olefinic hydrogen is presented in the initial tar in an amount of 8 %. It is possible to make a choice of techniques for further processing (hydrogenation, coking, thermal cracking) to obtain products with high added value on the basis of determination of the elemental composition, quantitative distribution of hydrogen in the primary coke oven tar and its fractions by the using of above mentioned physical and chemical methods. |